Lock.



T. M. KWASNIESKI.

LOOK.

APPLICATION FILED MAR. 15, 1910.

Patented 0ct.11,1910.

in l? I 31%;

INVENTUI? B Y gw.

ATTORNEY.

THOMAS M. KWASNIESKI, 0F STAMFORD, CONNECTICUT.

LOCK.

To all whom it may concern:

Be it known that I, THOMAS M. KwAs- NIESKI, a citizen of the United States, and a resident of Stamford, county of Fairfield, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates more particularly to a lock adapted for cabinet and similar purposes.

The primary object of the invention is to provide a lock in which the bolt may be positively held in either a locked or unlocked position by the tumblers so that the same can not be moved except by the proper key; and to provide means whereby the tumblers will prevent the inward or unlocking movement of the bolt except when the tumblers are moved a proper distance and only such distance, thus overcoming many of the objections incident to such devices as ordinarily constructed.

Another object of the invention is to provide a simple and efficient lock which may be readily constructed and assembled and which may be used for various purposes.

A further object of the invention is to provide a lock in which the tumblers and bolt are pro mrly guided and in which the tun'ibler or tumblers are arranged on the bolt.

VVit-h these and other objects in view, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a sectional view through a part of the lock casing, showing the bolt and tumblers in an unlocked position. Fi 2 is a similar view to Fig. 1 except that the bolt is in a locked position. Fig. 3 is a sectional view, taken on the line III-III of Fig. 1. Fig. 4: is a detail view of a part of the lock casing. Fig. 5 is a detail view of the bolt; and Fig. 6 is a detail view of one of the tumblers.

The casing 10 has a backing or plate member 11 provided with an angular portion 12 and a cap member 13 which is fastened to the member 11 by means of screws 14, and said member 11 is adapted to be held in position by screws which pass through open- Specification of Letters Patent.

Application filed March 15, 1910.

Patented Oct. 11, 1910.

Serial No. 549,786.

ings 15, all of which may be of the usual or of any preferred construction.

A bolt 16 is suitably guided within the casing, and said bolt has its locking end 17 adapted to pass through an opening 18 in the angular portion 12 of the lock casing and the bolt has a slotted portion 18 through which passes a pin 19 for the purpose of properly guiding the bolt in its movement from a locked to an unlocked position or vice versa. This bolt has a cutaway part 19 for the usual key which is adapted to fit over the post 20 in the usual way so that the bolt may be thrown according to the direction in which the key is moved, and said bolt has a plate-like or reduced part 21 upon which a plurality of tumblers 22, 23 and 24: are adapted to rest. As shown, there are three tumblers but this number may vary and each tumbler has a projecting part 22 with a substantially V-shaped end 23*, and said end or projecting portion 22 is adapted to fit or enter an opening or recess 24* in the locking end of the bolt 16 when the said bolt is in an unlocked position as shown in Fig. 1 and the V-shaped end 23 is adapted to engage a notch or shoulder 25 when the bolt is in an unlocked position as shown in Fig. 2. The plate-like part 21 serves to form a shoulder 26 on one side of the recess 2 1 and a, shoulder 27 on the other side and in the shoulder 27 is a notch 28 for engagement by the end 23* of the tumblers in case any one of the tumblers is moved too far, said tumblers having their engaging edges different distances from the post 20.

Each tumbler is slotted at one end, as at 29, in which is adapted to fit a pintle 30 serving as a pivot for the tumblers and each tumbler is provided with a spring 31 one end of which is held to each tumbler and the other end is adapted to engage the side of the casing member 13 so that as soon as the bolt is thrown by the key to an unlocked position, the said springs will force the tumblers to the position shown in Fig. 2 to hold the bolt in its outward movement. When the key is moved to throw the bolt to an unlocked position, the said tumblers are moved just far enough for the ends 22 23 to enter the recess 2 1 and should the key be such as to throw either one of the tumblers too far it will engage the notch 28 of the shoulder 27 and thus prevent the bolt from being moved. By this means the bolt is prevented from being moved except by the proper key.

A pin 32 is carried by the bolt 16 and said bolt is cut away, as at 33, to permit 1ts 1nward movement without engaging the pin or pintle 30 forming a pivot for the tumblers, and each of said tumblers is cut away, as at 34, to provide a shoulder 35. As will be seen when the bolt is moved to an unlocked position and the tumblers are in the position shown in Fig. 1, the shoulderof each tumbler 34 will be forced to a position to engage the pin 32 of the bolt, thus preventing the bolt from being operated except by a key that will properly move the tumblers to disengage the same from said pin, the slot 29 through the tumblers permitting a bodily or shifting movement of said tumblers.

In addition to the usual key, the lock may be constructed to adapt the same to be operated by a master key but such means forms no part of this invention. It will be seen that the bolt has an independent sliding movement with respect to the tumblers, and the said tumblers have not only a pivotal action but also a lateral movement to hold the bolt in an unlocked position.

From the foregoing, it will be seen that a simple and efficient lock is provided which is adapted particularly for cabinet though it may be used for other purposes; that the bolt of the lock is so constructed and arranged relative to the tumblers that the said tumblers serve to hold the lock in both an unlocked and locked position; that simple means is provided to prevent the look from being picked and the bolt from being operated, except by the proper means for this purpose; and that said lock may be easily and cheaply made and assembled.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A look comprising a casing, a bolt having a locking end provided with a recess and shoulders having notches on opposite sides of said recess, a pin and slot guiding means for the bolt, a pin carried by the bolt, a plurality of tumblers pivotally held to the easing over the bolt and each having a slot, a pin entering the slots and forming a pivot, a projection forming a part of each tumbler and adapted to enter the recess of the bolt when the latter is moved to an unlocked position and to engage the shoulders on opposite sides of the recess, and springs for the tumblers tending to force the same in one direction.

2. A look comprising a bolt having a looking end provided with a recess and a shoulder having a notch on one side of said recess, a pin carried by the bolt, a plurality of pivotally held tumblers each having a slot, a pin entering the slots, a projection forming a part of each tumbler and adapted to enter the recess of the bolt when the latter is moved to an unlocked position and to engage the shoulder when the bolt is moved to a locked position, said tumblers each having a shoulder to engage the pin on the bolt and spring for the timiblers tending to force the same in one direction.

3. A look comprising a bolt having a looking end provided with a recess and a shoulder on one side of said recess, a plurality of pivoted tumblers each having a slot, a pin;

passing through the slots, a projection forming a part of each tumbler and adapted to enter the recess of the bolt when the latter is moved to an unlocked position and to engage the shoulder on the side of the recess when the bolt is moved to a locked position, and means for moving the tumblers.

a. A look comprising a bolt having a looking end provided with a recess, a pin carried by the bolt, a plurality of pivoted tumblers each having a slot and a shoulder to engage the pin of the bolt, a pin entering the slots and forming a pivot, a projection forming a part of each tumbler and adapted to enter the recess of the bolt when the latter is moved to an unlocked position and to engage a part of the bolt, and springs tending to force the tumblers in one direction.

5. A lock comprising a bolt having a looking end provided with a recess and shoulders having notches on opposite sides of said recess, a pin carried by the bolt, a plurality of pivoted tumblers a portion of each of which adapted to engage said pin, a projection forming a part of each tumbler and adapted to enter the recess of the bolt when the latter is moved to an unlocked position and to engage the shoulders on opposite sides of the recess, and springs for the tumblers tending to force the same in one direction.

This specification signed and witnessed this 12th day of March A. D. 1910.

THOMAS M. KlVASNIESKI.

\Vitnesses W. A. TowNER, Jr., L. I. MAYER. 

